Apparatus for making hydrogen peroxid.



A. E. STOLL. APPARATUS FOR MAKING HYDROGEN PEROXID. APPLICATION FILED SEPT. 18, 1911.

peroxid the sodium peroXid was introduced -ALIBERT n. STOLL, OFQZOLLIKON, 'swrrrznntaun APPARATUS FOR MAKING HYDROGEN PEROXID.

Specification of Letters Patent.

Patented Feb. 11, iQLtS.

Application filed September 18, 1911. Serial No. 649,776.

into a'vessel with water and tlib necessary amount of acid such as sulfuric acid, the liquid being stirred with a stick or the like. A solution of hydrogen peroxid was then formed. This method of manufacture has great drawbacks. The sodium peroxid being very hygroscopic, the injection devices, such roses or the like, soon become clogged. Moreover, commercial sodium p'eroxid is never finely granulated but often contains large lumps which give rise to excessive local heating on contact with the water whereby the hydrogen peroxid, which is generated, is immediately decomposed, a large amount of oxygen bemg liberated. It 15 well known that the temperatureof the w ter is appreciably raised by the introduction of the sodium peroxid, which also results in a considerable loss of oxygen approximating 35, Apart from the fact that the above manufacture consumes much time, it is also rather dangerous for the workmen owing to the caustic nature of the sodium pcroxid 'and its tendency to become ignited, in the presence of damp organic substances.

The present invention has for its object an apparatus for the manufacture of hydro"- gcn peroxid by the above reaction, by means of which these drawbacks will be overcome.

The invention consists in an apparatus for the manufacture of hydrogen.peroxid, in which the sodium pcroxid is placed in a container arranged above the water vessel, a grinding device being located in the outlet of the container.

The improved apparatus also comprises means for agitating the cont nts of the re action vessel, and means for keeping the said reaction vessel cool during the manufacturc.

An example of the apparatus is diagram 3 provided with stirring vanes 15.

matically illustrated in the accompanying drawings, in which Figure l is a sectional elevation on line AB--C of Fig. 2, F i 2 a top view of the apparatus.

The form of invention illustrated has a generating vessel 2 provided with a suitable base plate and open at the top. To'protect the Walls of the vessel 2 from the action of the acid and the peroxid, these walls are covered with lead or enameled and provided with a cooling jacket 1.

' 6 denotes outlet for. the vessel.

In the vessel 2 is mounted a vertical shaft shaft 3 is driven through bevel wheels 11, one of which is keyed on a shaft 12, journaled on the cover 4tand having belt pulleys 13.

Above the vessel 2 is arranged a sodium peroxid container 7, consisting substantially of a cylindrical sheet metal vessel with a conical lower end. The bottom opening of the cone contains a grinding device 1 1: fixed to the cover The container 7 is rotated by means of spur wheels i), 10, the drive be ing transmitted from the bevel ear 11. The container 7 is preferably provided with a close fitting cover to protect the sodium pcroxid from the action of damp air.

The sodium peroxid is ground to a fine powder by means of the device 14, and then falls into the vessel 2. The Water in the latter, treated "by means of a suitable acid lution of hydrogen pcroxid remains cool and therefore very stable.

While I have herein shown and described onespcciiic embodiment of my invention I do not wish to be limited thereto except for such limitations as the claims may impart.

The

I claim- 1. An apparatus for the manufacture of iiydrogen peroxid comprising, a mixing vessel, a Water jacket surrounding said vessel, a container adapted to receive sodium pen oxid, means to pulverize said sodium peroxid, and means to distribute said sodium peroxid in said vessel. 1

2. An apparatus for the manufacture of hydrogen peroxid comprising a vessel, lead covering for said vessel a water jacket surrounding said vessel, an outlet in said vessel,

a cover on said vessel, stirring devices fitted 1n sald vessel, a container adapted to recelve sodium peroxid, a device on said container 15 adapted to grind the sodium vperoxid, substantially as shown and for the purpose set forth. v 1

x In testimony whereof I alfix my signature in presence of two witnesses.

ALBERT E. STOLL. \Vitnesses:

FRED IsLER, AUGUST Runes. 

